Subject:  USS Nautilus (SS168) - Report of 11th
War Patrol


A. PROLOGUE

27 June, 1944
1325 IK  Arrived DARWIN, North Territory from
10th War Patrol.  Made minor voyage repairs and
loaded for special missions to be conducted on
11th War Patrol.

B. NARRATIVE

30 June, 1944
1830 IK  Lieutenant Commander George Francis ROWE
A-V(T), USNR, reported aboard with party of
twenty-two (22) men for transportation to
vicinity of SABLAYAN POINT, MINDORO.  Four (4)
additional Army enlisted men were received aboard
for transportation to LEYTE and BOHOL.

1835 IK  Underway in accordance with Commander
Task Group 71.1 Secret Operation Order 82-44.

2121 IK  Sighted running lights of a plane
bearing 313 deg T, range 13 miles.  (Plane
Contract No. 1).

1 July, 1944
0609 IK  Made dawn dive.

0659 IK  Surfaced.

0944 IK  SD radar contact at 5 miles closing.
Sighted plane from bridge.  Plane believed to be
a BEAUFORT.  (Plane Contract No. 2).  Plane
appeared to be heading across our bow on a
zigzagging course, made a deceptive turn away and
then headed in.

0945 IK  Bombed and strafed by a plane while on
the surface.  No damage sustained.  Made quick
dive.  (Lat 10-24 S Long 128-40 E).  This plane
may have been a LILLY.

1056 IK  Surfaced.

1220 IK  SD radar contact at 36 miles.  (Plane
Contact No. 3).

1530 IK  SD radar contact at 26 miles.  (Plane
Contact No. 4).  Sighted three planes bearing 255
deg T on approximate course 330 deg T.

1838 IK  Sighted TIMOR bearing 311 deg T.

1905 IK  Sighted LETI Island bearing 351 deg T.

2248 IK  Sighted KISAR Island bearing 306 deg T.

2 July, 1944
0038 IK  Sighted ROMANO Island bearing 005 deg T.

0111 IK  Sighted NYATA Island bearing 357 deg T.

0230 IK  Sighted WETAR Island bearing 230 deg T.

0237 IK  Radar interference on SJ radar bearing
337 deg T to 007 deg T.  (Lat 07-33 S  Long
127-03 E).

0333 IK  SJ radar contact at 020 deg T, range
12,000 years.  Believed this to be USS Harder.
Maneuvered to avoid.  (Surface Contact No. 1).

0628 IK  Made dawn dive.

0706 IK  Surfaced.

3 July, 1944
0052 IK  Sighted BURU Island bearing 045 deg T.  

0507 IK  Sighted SANAHA Island bearing 007 deg T.

0623 IK  Made dawn dive.

0702 IK  Surfaced.  Sighted thin smoke and masts
of two small ships.  (Surface Contact No. 2).
Commenced approach.

0729 IK  Made quick dive for torpedo approach.

0732 IK  Manned Battle Stations Submerged.

0900 IK  Had good look at both ships which now
appeared to be small escort-type day cruisers
painted gray with white numerals on the bow.  Not
suitable torpedo targets.  Secured from Battle
Stations.  Observed ships until out of sight and
at 1103  IK surfaced.  

1106 IK   Sighted small sail bearing 105 deg T.
(Surface Contact No. 3).  Avoided.

1237 IK Sighted LIFUMATOLA Island bearing 350 deg T.

1731 IK  Sighted BACHAN Island bearing 054 deg T.

4 July, 1944
0032 IK  Crossed Equator at Longitude 125-03 E.

0422 IK  Passed TIFORE Island abeam to starboard,
distance 18 miles.

0622 IK  Made dawn dive.

0701 IK  Surfaced.

0722 IK  Sighted BIARO Island bearing 331 deg T.  

0812 IK  Sighted distant smoke bearing 277 deg T
apparently in BANGKA Straits.  (Surface Contact No. 4).

0826 IK SD radar contact at 14.5 miles.  (Plane
Contact No. 5).

0827 IK  With range closed to 12 miles, made
quick dive.  

1144 IK  Heard one distant depth charge.

1159 IK  Sound reported two "pingers" at 160 deg
T on 18 Kcs, weak and searching.  (Lat 01-48 N
Long 125-38 E).  

1203 IK  Heard two more depth charges, closer but
distant.

1210 IK Weak and fading screws at 160 deg T.

1321 IK  Heard last of weak and intermittent echo
ranging.

1348 IK  Up to periscope depth and all clear.

1445 IK  Surfaced.

1515 IK  Sighted two planes bearing 180 deg T,
range 14 miles.  (Plane Contact No. 6).

1558 IK  Sighted small sail bearing 317 deg T,
range 9 miles.  (Surface Contact No. 5).  

1615 IK  Sighted plane bearing 206 deg T, range
14 miles.  (Plane Contact No. 7).

1640 IK  Completed transit of BANGKA Passage.  

2122 IK  Observed radar interference on SJ radar
screen bearing 233 dg T drawing  to the left.
(Lat 02-33 N  Long 124-10 E).

2156 IK   Lost all indication of radar
interference.

5 July, 1944
0631 IK  Made dawn dive.

0713 IK  Surfaced.

1159 IK  Sighted small sail bearing 357 deg T.
(Surface Contact No. 6).  

1615 IK  Sighted TAWITAWI Island bearing 349 deg T.

1642 IK  Sighted faint smoke and lone mast
bearing 320 deg T in SIBUTU Passage.  (Surface
Contact No. 7).  

1800 IK  Commenced transit of SIBUTU Passage.

1937 IK  Sighted two sails in eastern side of
passage on a southerly course.  Surface Contact
No. 8).  Avoided.

2052 IK  Sighted a sail bearing 340 deg T in
western side of passage.  (Surface Contact No.
9).  Avoided.

2138 IK  Completed transit of SIBUTU Passage.

6 July, 1944
0113 IK  Completed transit of passage between
PEARL Bank and DOC CAH Island.

0634 IK  Made dawn dive.

0713 IK  Surfaced.

0718 IK  Sighted JOLO Island bearing 144 deg T.  

1110 IK  Sighted MINDANAO Island bearing 112 deg T.

2135 IK  Sighted PANAY Island bearing 030 deg T.

7 July, 1944
0430 IK  Sighted BATBATAN Island bearing 016 deg T.

0546 IK  Sighted MANIQUIN Island bearing 334 deg T.

0629 IK  Made dawn dive.

1128 IK  Sighted MINDORA Island bearing 330 deg
T, distance 40 miles.

1925 IK  Surfaced.

2323 IK  Sighted PANDAN Islands bearing 355 deg T.

8 July, 1944
0203 IK  Disembarked three (3) men by rubber boat
to conduct day reconnaissance of NORTH PANDAN
Island.

0325 IK  Reconnaissance party reported safely
ashore.

0627 IK  Made dawn dive for periscope
reconnaissance of beach.

0833 IK  Sighted small sail bearing 157 deg T.
(Surface Contact No. 10).  This sail was in sight
practically the entire day.

1117 IK  Sighted small patrol craft on a
southerly course.  (Surface Contact No. 11).
Patrol boat proceeded south to about SABLAYAN
Point and at about noon reversed course for Cape
CALIVITE.

1430 IK  Lost sight of patrol boat.

1602 IK  Sighted pre-arranged security signals on
NORTH PANDAN Island.

2052 IK  Surfaced.

2149 IK  SJ radar contact on sail at 073 deg T,
6,750 yards.

2152 IK  Opened hatches and commenced breaking
out cargo and rubber boats.  During the unloading
the ship was hove to at an average distance of
500 years from the beach with this distance at
times down to 250 yards.

9 July, 1944
0203 IK  Last boat load of cargo and men left the
ship.  It required four trips to transfer 12 tons
of stores and 19 men.  

0205 IK  Set course at four-engine speed to clear
area.

0335 IK  Sighted AMBULONG Island.

0554 IK  Sighted sail bearing 075 deg T, range 4
miles.  (Surface Contact No. 12).

0633 IK  Made dawn dive.

2013 IK  Surfaced.

2215 IK  Sighted MANIQUIN Island bearing 102 deg T.

2323 IK  Sighted BATBATAN Island bearing 109 deg T.

10 July, 1944
0034 IK  SJ radar contact on sail at 260 deg T,
4,000 yards.  (Surface Contact No. 13).  Avoided.

0630 IK  Made dawn dive.

0712 IK  Surfaced.

0837 IK  Sighted NEGROS Island.

1126 Ik  Sighted two sails bearing 057 deg T.

1127 IK Sighted a sail bearing 107 deg T.

1139 IK  Sighted a fourth sail bearing 195 deg T.

1156 IK  Sighted three additional sails bearing
101 deg T.  (Surface Contact No. 14).

1340 IK  Sighted MINDANAO Island bearing 144 deg T.

1557 IK  Sighted SIQUIJOR Island bearing 077 deg T.

1705 IK  Sighted two small sails bearing 207 deg
T.  Surface Contact No. 15).

1728 IK  Sighted a third sail bearing 249 deg T,
range 10 miles.  (Surface Contact No. 16).

2151 IK  Passed APO Island abeam to port,
distance 9 miles.

2307 IK  Passed SIQUIJOR Island abeam to port,
distance 9 miles.

11 July, 1944
0010 IK  Sighted sail bearing 155 deg T, range 4
miles.  (Surface Contact No. 17).

0410 IK  Sighted sail bearing 152 deg T, range 5
miles.  (Surface Contact No. 18).

0412 IK  Passed BOHOL Island abeam to port,
distance 15 miles.

0607 IK  Made dawn dive.  Conducted submerged
patrol in eastern part of MINDANAO Sea.

2004 IK  Surfaced.

12 July, 1944
0619 IK  Made dawn dive.  Conducted submerged
patrol in eastern part of MINDANAO Sea.

1955 IK  Surfaced.

2258 IK  Entered SURIGAO Strait.

13 July, 1944
0003 IK  SJ radar contact bearing 025 deg T,
range 6,800 yards.  (Surface Contact No. 19).

0005 IK  Sighted what appeared to be a
medium-sized sailboat.  Maneuvered to avoid.

0152 IK  Passed HIBUSON Islands abeam to
starboard at 6 miles.

0601 IK  Made dawn dive.  Conducted submerged
reconnaissance of LAGOMA.  Security signals were
not observed.

2027 IK  Surfaced.

14 July, 1944
0555 IK  Made dawn dive.  Conducted submerged
reconnaissance at alternate spot off SAN ROQUE.  
0742 IK  Sighted proper security signals.

1830 IK  Noted considerable boat activity and
about five hundred men on the beach north of SAN
ROQUE.

1910 IK  Observed a small banca flying a very
clean set of American Colors standing out from
the beach with four men.

1943 IK  Surfaced.

1944 IK  Colonel KANGLEON came aboard.

1948 IK  Opened the deck hatches and commenced
striking cargo topside.

2030 IK  First boat came alongside to receive
cargo.  During the unloading the ship was hove to
at an average distance of 600 yards from the
beach.  After the initial wait for boats the
unloading went well.  There were "many boats" and
of good size, and the ship never lacked boats to
load.  Colonel KANGLEON'S organization was good,
and both he and his men had only one desire -
guns and ammunition.

15 July, 1944
0041 IK  All cargo clear of the ship and all
shore-based personnel ashore.  In addition to the
regular assigned cargo the ship delivered the
following dry stores:  250 Lbs. corned beef, 150
Lbs. cured ham, 350 Lbs. cured bacon, 50 Lbs.
powdered eggs and 200 Lbs. white sugar.  Set
course at three and seven-eighths engine speed
for the 100 fathom curve.

0129 IK  Made trim dive.  (Diving time 1 minute
59 seconds).

0144 IK  Surfaced.

0331 IK  SJ radar contact bearing 140 deg T,
range 3,700 yards.

0334 IK  Sighted contact from bridge.  Appeared
to be a sail.  (Surface Contact No. 20). 

0430 IK  Entered MINDANAO Sea.

0436 IK  Sighted the first of four medium-sized
sails on an easterly course, average range 5,000
years.  (Surface Contact No. 21).

0528 IK  Sighted BOHOL Island bearing 271 deg T,
distance 40 miles.

0614 IK  Sighted CAMIGUIN Island bearing 211 deg
T, distance 35 miles.

0621 IK  Made dawn dive.

1954 IK  Surfaced.

16 July, 1944
0230 IK  Entered SULU Sea.

0613 IK  Made dawn dive to conduct submerged
reconnaissance off BALATONG Point.

0737 IK  Sighted proper security signals.

1925 IK  Observed two boats standing out from
BALATONG Point.

1947 IK  Surfaced.

1958 IK  Colonel ABCEDE came aboard.  Received
special cargo consisting of one box and two
packages.  Delivered 184 Lbs. corned beef, 28
Lbs. canned bacon, 12 Lbs. baking powder, 1`-3/4
cases of .45 Cal. Ammunition and a moderate
amount clerical supplies.

2017 IK  Set course for SIBUTU Passage.

2304 IK  SJ radar contact bearing 217 deg T,
range 3,200 yards.  Sighted 4 or 5 small objects
from the bridge.  Maneuvered to avoid.  (Surface
Contact No. 22).

17 July, 1944
0055 IK  SJ radar contact at 112 deg T, range
8,550 yards.  (Surface Contact No. 23).  Lost
contact 4 minutes later.

0307 IK  Sighted bright glow over the horizon
bearing 142 deg T.  (Lat 08-25 N  Long 121-41 E).
Appeared to be an explosion and fire.

0309 IK  - 0350 IK  English voice on 2880 Kcs
using aircraft code.  Unable to understand.

0626 IK  Made dawn dive.

0705 IK  Surfaced.

1119 IK  Sighted JOLO Island bearing 148 deg T.

1159 IK  Sighted PANGUTARAN Island bearing 180
deg T.

1243 IK  Sighted sail bearing 259 deg T.
(Surface Contact No. 24).  Avoided.

1300 IK  Set all ship's clocks back one-half hour
to conform with -9 ZT.

1448 I  Sighted CAP Island bearing 188 deg T.

1530 I  Sighted LAPARAN Island bearing 184 deg T.

1620 I  Sighted TAWITAWI Island bearing 175 deg T.

1623 I  Sighted PEARL Bank Light bearing 219 deg T.

1745 I  Completed transit of passage between DOCCAN
Island and PEARL Bank.

1746 I  Sighted BONGAO Island.

2056 I  Sighted SIBUTU Island.

2350 I  Completed transit of SIBUTU Passage.

18 July, 1944
0610 I  Made dawn dive.

0645 I  Surfaced.

0741 I  SD radar contact at 8 miles.  (Plane
Contact No. 8).  Made quick dive.  Range closed
to 4 miles while diving.

0747 I  Received one depth bomb.  Not too close.
Set shallow.  No damage.

0920 I  Sighted plane similar to contact No. 8 by
periscope.  (Plane Contact No. 9).


1143 I  Surfaced.

1144 I  Sighted plane similar to contact No. * at
5 miles, heading in.  (Plane Contact No. 10).
Made running dive.

1928 I  Surfaced.

19 July, 1944
0540 I  Passed SOUTH WATCHER Island abeam to
port.

0628 I  Made dawn dive.

0657 I  Surfaced.

0730 I  Crossed Equator at Longitude 119-13 E.

1327 I  Sighted sail bearing 155 deg T.  (Surface
Contact No. 26).  Avoided.

1705 I  Sighted two sails bearing 154 deg T.
(Surface Contact No. 27).

20 July, 1944
0353 I  Interference on SJ radar similar to our
own SJ radar believed to be USS PUFFER or USS RAY.

0634 I  Made dawn dive.

0703 I  Surfaced.

0753 I  Sighted shears of a submarine bearing 310
deg T.  (Surface Contact No. 29).  Closed to
communicate with friendly submarine and at 0849 I
in communication with USS RAY by light and voice
radio.  Agreed to search area to southard and RAY
to search area to northard of eastern 100 fathom
curve of BORNEO Bank.

1044 I  Sighted large flying boat at 15 miles.
(Plane Contact No. 11).  Made quick dive.

1139 I  Surfaced.

1528 I  Having covered area as thoroughly as
possible to southard with no contact, ran down
the reverse of possible convoy route.

1804 I  Sighted BUTONG BUTONGANG Island bearing
177 deg T.

1833 I  Sighted sail bearing 116 deg T.  (Surface
Contact No. 29).

1850 I  Sighted MORASINDEH Island bearing 151 deg T.

2346 I  SJ radar contact bearing 215 deg T, range
2,750 yards. Believed to be a small sail.
(Surface Contact No. 30).  Lost contact 12
minutes later.

21 July, 1944
0627 I  Made dawn dive.

0710 I  Surfaced.

0741 I  Sighted LOMBOK Island bearing 195 deg T.

0802 I  Sighted sail bearing 347 deg T.  (Surface
Contact No. 31).

0933 I  Sighted BALI Island bearing 244 deg T.

0945 I  Sighted sail bearing 195 deg T.  (Surface
Contact No. 32).

1515 I  sighted sail bearing 210 deg T.  (Surface
Contact No. 33).

1549 I  Sighted two sails bearing 195 deg T and
264 deg T.  Surface Contact No. 34).

2030 I  Commenced transit of LOMBOK Strait.

2135 I  Two contacts on SJ radar, 30 deg on each
bow.  (Surface Contact No. 35).  Tracking and
sighting indicated both to be patrols.  Avoided.

2300 I  Completed transit of LOMBOK Strait.

2315 I  Radar interference on SJ radar dead ahead
similar to own SJ radar, believed to be USS
PUFFER.

22 July, 1944
0030 I  SJ radar contact bearing 127 deg T.,
range 5 miles.  (Surface Contact No. 36).

0643 I  Made dawn dive.

0754 I  Surfaced.

1430 I  Sighted shears of a submarine bearing 043
deg T, range 12 miles, believed to be USS RAY.
(Surface Contact No. 37).

23 July - 27 July, 1944
Enroute to FREMANTLE.  Conducted dawn dives for
trim, daily qualification school, and training of
men in new watches.

C. WEATHER
	The weather was excellent throughout the
	entire patrol and in general conformed with
	the "Sailing Directions."  The southeast
	monsoon was well developed, and especially in
	MAKASSAR Strait and the approaches to LOMBOK
	Strait where winds of 25-30 knots were
	encountered.  Rain was encountered only in
	the CELEBES Sea.  Some haze was found,
	generally when the winds were light and
	variable.

D. TIDAL INFOMRATION
	No tidal information was obtained.  However,
	currents caused by the tides agreed with the
	current "Tide Tables."  In passage from
	SIBUTU Passage to LOMBOK Passage vial
	MAKASSAR an average southerly set of 1.3
	knots was observed.  Transit of LOMBOK Strait
	was made on a flood tide and no current was
	experienced.

E. NATIVATIONAL AIDS
	No lighted navigational aids were sighted.
	The following lighthouses appeared to be
	intact and in their proper position:  TALISEI
	Island, PEARL Bank, NORTH OBIAN Island,
	MANIQUIN Island, and AMBULONG Island.

	Two buildings at the base of PEARL Band Light
	were observed which were not noted on the
	last patrol in this area.

H. ATTACK DATA
	No suitable gun or torpedo targets were
	encountered.

I. MINES
	No mining activity was noted.

J. ANTI-SUBMARINE MEASURES AND EVASION TACTICS
	In the forenoon of July 1st while south of
	the Barrier, the deliberate bombing and
	strafing was believed to have been carried
	out by a friendly plane, a BEAUFORT.  He was
	sighted at about 4 miles headed across our
	bow on an irregular course.  He was observed
	to turn away when about 2 miles away and then
	headed in.  He allowed too much lead as his
	bomb landed ahead.  His strafing, which came
	from two wing 20MM or .50 Cal. Guns, passed
	down our starboard side about 100 feet
	distant.  No damage was sustained.

	The depth charges heard about noon on the 4th
	of  July about 30 miles southeast of BANGEA
	Passage were believed to be nuisance charges
	as they were not close nor was there anything
	in sight.

	The depth bomb received on the morning of 18
	July in the CELEBES Sea between SIBUTU and
	MAKASSAR Strait was not released until we
	were at 120 feet.  It felt to be close but
	shallow.  This plane was very persistent and
	stayed in our vicinity the entire morning
	successfully keeping us driven down all day.

K. MAJOR DEFECTS AND DAMAGE
	No. 1 Main Engine was operated throughout the
	patrol on 14 cylinders without excess
	vibration, smoking, or casualties.  This was
	necessary due to a casualty which occurred
	during the 10th War Patrol.  It would not
	start by itself.  It was necessary to start
	it by rolling it with No. 3 Main Engine.

	Ten (10) cylinder head holding down studs
	carried away during the patrol with a total
	loss of 8 engine hours.

	On 3 July while on the finishing rate during
	the Battery Charge the after bearing on the
	port Main Motor cooling blower burned out.
	This casualty was caused by the loosening of
	the drain plug due to vibration which allowed
	the lubricating oil to drain out.  The
	bearing was renewed with a spare.

	This ship was drydocked at Submarine Base
	Pearl Harbor the last of March, 1944, upon
	the request of the ship to have the sea
	valves worked on.  During this run the sea
	and stop valves to Sludge Tank, Secondary
	Drain Pump Forward, and the Officer's Head
	leaked excessively.  Of four valves on the
	Officer's Head flushing line, none would
	hold.  Sludge Tank sea valves were ground in
	and replaced by spares.  The Drain Pump
	discharge had to be blanked off.  All valves
	inspected showed signs of excessive corrosion
	and pitting and presented the appearance of
	not having been worked on since the Navy Yard
	overhaul of August 1943.  All sea valves need
	to be worked on this refit.

L. RADIO
	All radio equipment functioned
	satisfactorily.  The only casualty was a
	burned out blower motor for the master
	oscillator compartment of the TBL-5 which was
	replaced with a spare.

      Throughout the patrol, Radio Perth Baker
      schedules were copied on 9250 Kcs.
      Occasional shifts were made at night to
      4370 Kcs due to interference, but
      interference was heavy on the latter
      frequency as well.

     Communication was established with the USS
     RAY on the coordinated attack frequency of
     2880 Kcs with fair results.  

     During transmission on 9 July, an attempt to
     establish communication on 4235 Kcs was
     without success.  Upon a shift to 8470 Kcs,
     communication was established with Radio
     Coonawarra immediately through heavy
     Japanese interference.  On 16 July
     transmission was accomplished on 8470 Kcs
     through Radio Honolulu on the first call up,
     communication conditions excellent.

     First Task Force 71 serial received:  Serial
     87, 301041 June
     Last Task Force 71 serial received:  ??
     First NAUTILUS transmission:  ??
     Last NAUTILUS transmission:  ??

M. RADAR
     SJ Radar
          The operation of the SJ radar was very
          satisfactory during the entire patrol.
          Small boats and sails were picked up at
          ranges up to 8,000 yards.  Maximum
          ranges observed were as follows: Land -
          100,000 yards, friendly submarines -
          15,000 yards, and rain squalls - 37,000
          yards.

          The only casualty occurred on the
          evening of 6 July when the transmitter
          pulse was lost and high current was
          drawn.  Source of trouble was traced to
          a shorted C22 condenser, burned out R36
          resistor, and a shorted magnetron.  The
          faulty elements were replaced and the
          transmitter retuned.  Total time out of
          commission during the patrol was 6.5
          hours.

	    All radar interference encountered is
	    believed to have been caused by friendly
	    submarines.

     SD Radar
          The SD radar operated satisfactorily
          throughout the run.  The set was tuned
          to a frequency of 118.2 MC prior to the
          beginning of this patrol.  Intermittent
          operation was used, operating the set 5
          seconds out of each minute.  Ranges
          obtained on this patrol were much
          improved over the previous two patrols.
          Maximum ranges observed were as
          follows:  Planes - 36 miles and land -
          50 miles.  The average range on
          aircraft was 14 miles.

          The only casualty other than normal
          tube replacement was due to the faulty
          head of the SD mast.  Prior to
          departure on patrol low readings were
          obtained on the mast and the trouble
          traced to a leak around the vulcanized
          head.  The head was lifted, the
          insulators cleaned, and the head coated
          with glyptol.  During the patrol the
          trouble re-occurred after a series of
          all-day dives.  The ground readings
          were brought up by using sandpaper on
          the head and coating with glyptol.  The
          antenna head should be replaced during
          the coming refit.

     CUO Radar Detector
          The CUO radar detector was operated
          when within 30 miles of enemy-held
          territory, in the vicinity of suspected
          radar installations, and when
          interference was observed on the SJ
          radar, with negative results.  This is
          the third patrol that this set has been
          operated without success.  It is
          recommended that the present
          installation aboard be replaced by a
          newer and different type.

N. SOUND GEAR AND SOUND CONDITIONS
	The sound gear performed satisfactorily.
	Sound conditions in the area were excellent.
	On 8 July while north of SABLAYAN  Point the
	JP sound gear was able to pick up weak screws
	from a patrol vessel before either of the
	sets of supersonic gear could establish
	contact.

O. DENSITY LAYERS
      On the 4th of July while about 30 miles
      southeast of BANGKA Passage Latitude 01-0 N
      Longitude 125-22 E a 6 deg negative
      gradient was observed to extend between 260
      feet and 300 feet.  This was the only
      density layer noted on this patrol.

P. HEALTH, FOOD, AND HABITABILITY
	The health of the crew was excellent during
	the entire patrol.  The only serious casualty
	was the compound fracture of the left Tibia
	of an Army sergeant received from the
	accidental discharge of a .45 Cal. Automatic
	pistol.  After the second day he was in no
	pain and constantly in good spirits.  His leg
	will have to be reset ;upon hospitalization
	ashore.

	The twenty-four additional men with a full
	load of cargo confined the movements of all
	hands.  Living conditions were limited.  On
	all day dives with full cargo and passengers,
	CO2 was held down to 1.5 percent by the use
	of only one can of CO2 absorbent each day.
	The capacity of the air-conditioning units
	was sufficient and under the crowded
	conditions of loading kept the habitability
	good.

     The food in general was good and well
     prepared.  The passengers placed a strain on
     the food reserves aboard.  Over 550 lbs. Of
     canned flour had to be surveyed due to
     weevils which cut us very short on bread and
     pastries.  Due to the inability to draw
     ground coffee in DARWIN and the extra men
     aboard, the ship was short of coffee for the
     last week of the patrol.


Q. PERSONNEL
	The state of training off the crew was good.
	The performance of duty under combat
	conditions and in enemy controlled waters was
	excellent and in keeping with the highest
	traditions of the Navy.  The interest and
	enthusiasm of the men in the "gun running
	business" left nothing to be desired.

     Particularly outstanding and worthy of
     special credit during the past three war
     patrols were the performance of duty of the
     following officers and men:

     Lieutenant (jg) H. M. WINNER, USNR, who as
     Diving Officer, has consistently maintained
     this ship in a perfect diving trim and under
     the most strenuous conditions of
     compensating for cargo has maintained a trim
     without hazard to the ship.

     Ensign F. R. PORTERFIELD, USN who as First
     Lieutenant and Cargo Officer, has
     contributed outstandingly to the success and
     smartness of the execution of all special
     missions.  He has performed his duties with
     foresight and in such a competent, skillful,
     and highly successful manner as to bring
     credit to our policy of appointing enlisted
     men to commissioned rank, our Navy, and
     himself.

     GOODMAN, J. V., CMoMM(PA), USN, and BRUCK,
     N. A., CMoMM(PA), who as leading Motor
     Machinist Mates in the Engine Room and Petty
     Officers in charge of cargo, have diligently
     applied themselves to maintaining an
     efficient Main Engineering Plant in spite of
     its chronic weaknesses and unreliability.
     They have contributed outstandingly to the
     success of all missions accomplished and
     through their industry and interest largely
     made the third patrol of this series
     possible.  Their interest and effort in
     handling cargo and its problems have saved
     time and materially aided in the successful
     completion of all missions in a minimum of
     time.

     Sixty sessions of qualifications school have
     been held since the last refit period.  
	(a) Number of men on board during patrol - - - - - - - - -- - - 96	
	(b) Number of men qualified at start of patrol - - - - - - - -  73
	(c) Number of men qualified at end of patrol - - - - - - - - -  89
	(d) Number of unqualified men making their first patrol - - - - 20
	(e) Number of men advanced in rating during patrol - - - - - - - 9
	(f) Number off men fully qualified for advancement but without 
	    authority to advance in rating - - - - - - - - - - - - - - -14

R. MILES STEAMED - FUEL USED
	Darwin to Barrier        365 Miles*      9,485 Gallons
	North of Barrier       4,220 Miles      61,725 Gallons
	Barrier to Fremantle   1,490 Miles      26,400 Gallons

                     *Pit Log Mileage

S. DURATION
	Days enroute to Malay Barrier   1 Day
	Days north of Malay Barrier    20 Days
	Days enroute to Fremantle       6 Days
	Days submerged                 10 Days

T. FACTORS OF ENDURANCE RREMAINING

	TORPEDOES     FUEL    PROVISIONS     PERSONNEL
          6-MK14     41,700    10 Days        14 Days

       Limiting factor this patrol:  Completion
       of Missions.

U. REMARKS
     At the time of hearing the depth charges on
     4 July the ship was at 120 feet depth with
     the port shaft out of commission while main
     motor cooling blower bearing was being
     renewed.

      At the request of Lieutenant Commander
      Rowe, his party was landed on North Pandan
      Island.  His recco party reported the site
      as ideal for their immediate requirements.
      The ship furnished five seven-man, and one
      four-man, rubber boats which were left with
      the party.  The ship did not close the
      beach and commence unloading immediately
      after surfacing because of the presence of
      a sailboat.  This boat had apparently
      sailed from Sablayan in the morning, to one
      or two barrios to the northward, and
      returned in the afternoon and evening.  It
      was last seen to southward of South Pandan
      Island haring toward Sablayan.

      Colonel Kangleon reported that Japs were in
      Lagoma and that fighting was still in
      progress - six kilometers from the site
      where we were unloading.

      During passages through Sibutu, no ships
      were seen at anchor off Tawitawi, either
      visually or by radar.

      If another unsuccessful attempt had been
      made to surface on 18 July, we would have
      run out of electricity before sunset.

      The patrol sighted in Lombok Strait
      appeared to be about the size of our YMS,
      appeared more bulky than an SC or PC.
      Maximum radar range was 13,000 yards.

      Nautilus has been underway 87 days out of
      the last 94 days and has steamed over
      20,300 miles since last refit.



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